package com.hxzy.security;

import com.hxzy.security.handler.AuthenticationEntryPointImpl;
import com.hxzy.security.handler.JwtAuthenticationTokenFilter;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.http.HttpMethod;
import org.springframework.security.authentication.AuthenticationManager;
import org.springframework.security.config.annotation.authentication.builders.AuthenticationManagerBuilder;
import org.springframework.security.config.annotation.method.configuration.EnableGlobalMethodSecurity;
import org.springframework.security.config.annotation.web.builders.HttpSecurity;
import org.springframework.security.config.annotation.web.builders.WebSecurity;
import org.springframework.security.config.annotation.web.configuration.EnableWebSecurity;
import org.springframework.security.config.annotation.web.configuration.WebSecurityConfigurerAdapter;
import org.springframework.security.config.http.SessionCreationPolicy;
import org.springframework.security.core.userdetails.UserDetailsService;
import org.springframework.security.crypto.bcrypt.BCryptPasswordEncoder;
import org.springframework.security.crypto.password.PasswordEncoder;
import org.springframework.security.web.authentication.AnonymousAuthenticationFilter;
import org.springframework.security.web.authentication.UsernamePasswordAuthenticationFilter;
import org.springframework.security.web.authentication.logout.LogoutFilter;
import org.springframework.security.web.authentication.logout.LogoutSuccessHandler;
import org.springframework.web.cors.CorsConfiguration;
import org.springframework.web.cors.UrlBasedCorsConfigurationSource;
import org.springframework.web.filter.CorsFilter;

import java.util.ArrayList;
import java.util.List;

/**
 * spring security配置
 */
@EnableWebSecurity
@EnableGlobalMethodSecurity(prePostEnabled = true)
@Configuration
public class TZXMSpringSecurityConfig  extends WebSecurityConfigurerAdapter {

    /**
     * 自定义实现用户验证和授权代码
     */
    @Autowired
    private UserDetailsService tZXMUserDetailsServiceImpl;

    /**
     * 未登录自定义异常
     */
    @Autowired
    private AuthenticationEntryPointImpl  unauthorizedHandler;

    /**
     * 登出成功
     */
    @Autowired
    private LogoutSuccessHandler  logoutSuccessHandlerImpl;

    /**
     * 令牌自定义拦截器(spring security方式来实现)
     */
    @Autowired
    private JwtAuthenticationTokenFilter jwtAuthenticationTokenFilter;



    /**
     * 解决 无法直接注入 AuthenticationManager (认证管理核心对象)
     *
     * @return
     * @throws Exception
     */
    @Bean
    @Override
    public AuthenticationManager authenticationManagerBean() throws Exception
    {
        return super.authenticationManagerBean();
    }

    /**
     * 身份认证接口
     */
    @Override
    protected void configure(AuthenticationManagerBuilder auth) throws Exception
    {
        auth.userDetailsService(tZXMUserDetailsServiceImpl).passwordEncoder(passwordEncoder());
    }

    /**
     * 密码验证规则
     * @return
     */
    @Bean
    public PasswordEncoder passwordEncoder(){
        return new BCryptPasswordEncoder();
    }

    @Override
    public void configure(WebSecurity web) throws Exception {
        web.ignoring().antMatchers("/v2/api-docs", "/configuration/ui", "/swagger-resources", "/configuration/security", "/swagger-ui.html", "/webjars/**");
    }

    /** 配置请求，哪些要拦截，哪些要放些，扩展自定义登录，登出页
     * anyRequest          |   匹配所有请求路径
     * access              |   SpringEl表达式结果为true时可以访问
     * anonymous           |   匿名可以访问
     * denyAll             |   用户不能访问
     * fullyAuthenticated  |   用户完全认证可以访问（非remember-me下自动登录）
     * hasAnyAuthority     |   如果有参数，参数表示权限，则其中任何一个权限可以访问
     * hasAnyRole          |   如果有参数，参数表示角色，则其中任何一个角色可以访问
     * hasAuthority        |   如果有参数，参数表示权限，则其权限可以访问
     * hasIpAddress        |   如果有参数，参数表示IP地址，如果用户IP和参数匹配，则可以访问
     * hasRole             |   如果有参数，参数表示角色，则其角色可以访问
     * permitAll           |   用户可以任意访问(登录过的用户)
     * rememberMe          |   允许通过remember-me登录的用户访问
     * authenticated       |   用户登录后可访问
     */
    @Override
    protected void configure(HttpSecurity httpSecurity) throws Exception
    {
        List<String> excludeUrls=new ArrayList<>();
        excludeUrls.add("/api/login");
        excludeUrls.add("/api/getQR");
        excludeUrls.add("/api/loginQR");
        excludeUrls.add("/api/captcha/png");
        excludeUrls.add("/api/captcha/gif");
        excludeUrls.add("/api/captcha/airth");
        excludeUrls.add("/front/**");

        String[]  exclude= excludeUrls.toArray(new String[excludeUrls.size()]);


        httpSecurity
                // CSRF禁用，因为不使用session
                .csrf().disable()
                // 认证失败处理类
                .exceptionHandling().authenticationEntryPoint(unauthorizedHandler).and()
                // 基于token，所以不需要session(禁用session)
                .sessionManagement().sessionCreationPolicy(SessionCreationPolicy.STATELESS).and()
                // 过滤请求
                .authorizeRequests()
                // 对于登录login 注册register 验证码captchaImage 允许匿名访问
                .antMatchers(exclude).permitAll()
                .antMatchers(
                        HttpMethod.GET,
                        "/",
                        "/*.html",
                        "/**/*.html",
                        "/**/*.css",
                        "/**/*.js",
                        "/static/fonts/**",
                        "/static/**",
                        "/profile/**"
                ).permitAll()
                .antMatchers("/doc.html").permitAll()
                .antMatchers("/swagger-ui.html").permitAll()
                .antMatchers("/swagger-resources/**").permitAll()
                .antMatchers("/swagger-ui/**").permitAll()
                .antMatchers("/swagger/**").permitAll()
                .antMatchers("/v2/**").permitAll()
                .antMatchers("/webjars/**").permitAll()
                .antMatchers("/configuration/**").permitAll()
                .antMatchers("/*/api-docs").permitAll()
                .antMatchers("/druid/**").permitAll()
                // 除上面外的所有请求全部需要鉴权认证
                .anyRequest().authenticated()
                .and()
                .headers().frameOptions().disable();

        httpSecurity.logout().logoutUrl("/api/logout").logoutSuccessHandler(logoutSuccessHandlerImpl);

        // 添加JWT filter
        httpSecurity.addFilterBefore(jwtAuthenticationTokenFilter, AnonymousAuthenticationFilter.class);

        // 添加CORS filter
        httpSecurity.addFilterBefore(corsFilter, JwtAuthenticationTokenFilter.class);
        httpSecurity.addFilterBefore(corsFilter, LogoutFilter.class);

    }


    @Autowired
    private CorsFilter corsFilter;




}
